3DIC Optical Transmission Modules for Capacity and Service Life
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Solution Overview
Problem
Existing electro-optical modules in optical fiber communications face challenges in efficiently increasing data-carrying capacity and reliability due to limitations in modulation schemes and component lifespan.
Innovation Solution
Implementing advanced modulation techniques such as QPSK and 16 QAM, and using a 3DIC structure with stacked electronic and photonic dies, along with polarization and wavelength division multiplexing, to enhance data-carrying capacity and reliability by optimizing the transmission module design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If advanced modulation techniques (QPSK, 16 QAM) are implemented to increase data transmission rate, then productivity increases, but device complexity increases
Solution Approach 1:
The patent segments the modulation functionality into separate electronic dies (first electronic die for QPSK, second electronic die for 16 QAM) that can be independently selected and activated. This allows the system to achieve high data transmission rates through 16 QAM when needed while maintaining the ability to use simpler QPSK modulation, thus managing device complexity through modular functional segmentation.
2Reliability
If backup electronic dies are integrated to extend service life, then reliability increases, but device complexity increases
Solution Approach 1:
The patent merges the backup electronic die with the primary electronic die in a stacked 3DIC configuration, where the backup die is positioned directly above or beside the primary die. This merging approach extends service life through redundancy while minimizing the increase in device complexity by utilizing vertical stacking rather than lateral expansion, thus efficiently combining reliability enhancement with compact integration.
3Productivity
If 3DIC stacked structure is used to integrate multiple dies, then productivity increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces intermediary structures including bonding pads, alignment marks, and potentially buffer layers between the optical die and electronic dies in the 3DIC stack. These intermediaries facilitate precise alignment and bonding during manufacturing, enabling the integration of multiple functional dies (optical modulators, QPSK electronics, 16 QAM electronics, backup dies) while managing the manufacturing precision requirements through standardized interfaces and alignment mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly increases data transmission rates up to 400 Gbps and extends the service life of the transmission module by utilizing backup electronic dies, thereby improving the efficiency and reliability of optical communication systems.
Implementation Method 1
a first optical circuitry to: modulate a plurality of input optical signals in accordance with data and a polarization state of the input optical signals
Implementation Method 2
The optical fiber transmits the modulated optical signal to the reception module
Data Source
AI summary
An optical communication system and a method of signal transmission are provided. The optical communication system includes an optical fiber, a transmission module, and a reception module. The transmission module includes a first optical circuitry operable to: receive a plurality of input optical signals and data; modulate the plurality of input optical signals in accordance with the data and a polarization state of the plurality of input optical signals to generate a plurality of modulated optical signals; combine the plurality of modulated optical signals to form a combined signal; and relaying the combined optical signal to the optical fiber. The optical fiber transmits the combined optical signal to the reception module for detection.